What type of printer is used for billboard ads? -

Especially the huge huge ones...Do they use ultra large format printers or they have other ways?

A billboard is usually printed in a series of sections about 5 feet wide on a lare format commercial plotter. They are almost always preinted on vinyl using a pigment ink to withstand the elements and thie constant exposure to sunlight.

May Be they Use Plotters.... Plotters are large printers, which are used to print large sheets with pin-point accuracy.... Like they are used to print blue prints of projected buildings... For more precise answers, just google..